Combined talking-machine reproducer and radio loud-speaker unit



Dec. 21 1926.

1 1,611,571 A. A. WALKER COMBINED TALKING MACHINE REPRODUCER AND RADIO LOUD SPEAKER UNIT Filed Oct. 21, 1924 nozutoz attozneq Patented Dec. 21, 192 6.

' UNITED STATES ALBERT A. WALKER, OF PHILADELPHIA, PENNSYLVANIA.

COMBINED TALKING-MACHINE REPRODUCEIt AND RADIO LOUD-SPEAKER UNI'I.

Application filed October 21, 1924. Serial 110. 744,888.

' The object of my invention is to provide a talking machine reproducer and radio loud speaker combined in one unit and to provide a novel method of mounting the armature'in 5 such a device. I attain these and other objects of my invention by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a perspective view of my invention applied to a phonograph tone arm;

Fig. 2 is a section through the device, Fig.- 3 is a section on a plane at right angles to the section shown in Fig. 2; and

Fig.4 is a section on line 4-4 of Fig. 3. -Like characters of reference indicatejlike parts in each of the several views.

Referring to the "accompanying drawings,

I provide a cylindrical casing 1 having an .annular flange 2. I further provide an intermediate spacing disc 3 having a central aperture 4,. as shown in Figs. 2 and 3. I also provide a cover plate or casing 5 having a threaded cylindrical portion 6, adapted to be screwed on the threaded end 8 of the, tone arm A; I provide suitable screws or bolts 7 to fasten members 5, 3 and 2 together. I provide a, cover plate 9 threaded to engage the correspondingly threaded portion of casing 1. Mounted on cover plate 9 I provide the conventional metal late 1L and fixed magnet 10. Mounted on plate 11 are spaced electro-magnets 12 jhe pole pieces 13 of which are positioned in proximity to armature 14 and function toattract that armature when the pole pieces are magnetized.

Armature 14 is adj ustably mounted on screwthreaded rod 15. Rod 15 extends through and i is mounted on the cross phosphor-bronze spring 16 and suitably attached to the diaphragm 17'. As shown in Figs. 2 and 3 of the drawings, spring 16 is held between members 3 and 2; anddiaphragm 17 is held between members 3 and 5.

Referring to,Figs. 1 and 3, I provide the pivoted reproducer arm 18 having a suitable socket 21 .to receive any suitable sound reproducing needle. Rod 18 is mounted" on the pivot pin 20 and its inward end 19 is attached to armature 14. I provide radio conducting wires 23 attached to terminals 22,

as shown in Fig. I. Diaphragm 17 is preferably made of paper or of paper and silk.

7 In 0 eration the sound'waves transmitted.

, throug wires 23, terminals 22, and base plate 11, to ma nets 12, magnetize the pole pieces 13, and t earmatures in turn attract disc 14 through which the waves are transmitted to diaphragms 16 and 17, when the device is used as a radio-unit.

When the apparatus is used for reproducing phonograph records, the conventional sound reproducing needle traveling in the tances of the magnets from the armatures are adjusted by turning the 1 cap 9- which is threaded to the main shell'or casing 1 on which the magnets are fastened. The unit 1 may be provided with adapters. or sockets vof suitable size to fit various makes of talking machines.

It is within the contemplation of my invention to use the same unit, omitting the talking machine attachment, for a loud speaking horn. Y

My unit will take the place of two separate units; namely, the usual phonograph reproducer and the radio loudspeaker unit. It is a permanent attachment and does away with changing back and forth from one unit to the other, and confines all of the mechanism in a smaller space than is usually employed for this purpose. In addition to the above, it will also reproduce the radio signals upon a blank record.

What-I claim is: 1

1. In a combined-talking machine reproducer and radio loud speaking unit, the combination of a-casing member, a. cap "adjustably mounted on the casing, a radio loud speaker unit mounted on the cap, an armature spaced from and in close proximity to the pole pieces of the loud speaker unit, a threaded rod on which the armature is adjustably mounted, a cross spring attached to the casing and in which the threaded rod is mounted, a sound reproducing diaphragm towhich the end of the armature-supporting rod is attached, and a pivoted arm carrying the sound reproducing needle and having 1 one end attached to the aforesaid'armature.

'2. In a device of the class described, the combination of-a casing, a threaded cap adjustably mounted on the casing, a radio loud speaker unit mounted on said cap, the armatures of the unit being adjustable with the cap, an' armature positioned in proximity to and slightly spaced from the pole piecesof the radio loud speaker unit, a rod on which said armature is adjustably mounted, a cross spring on which sald rod-is mounted,

a spacing disc which functions with the casing to hold the cross spring in place, a sound reproducing diaphragm to which the rod carrying the first mentioned disc is attached, and a cover casing which functions with the spacing disc to hold the'diaphragm in place. In a device of the class described, the combination of a casing, a threaded cap adj ustably mounted on the casing, 21 radio loud speaker unit mounted on said cap, the pole pieces of the unit being adjustable With the cap, an armature positioned in proximity to and slightly spaced from the pole pieces of the radio loud speaker unit, a rod on which said armature is adjustably mounted, a cross spring on which said rod is mounted, a spacing disc which functions with the casing to hold the cross spring in place, a sound reproducing diaphragm to which the rod carrying the first mentioned disc is attached, and a cover casing which functions with the spacing disc to hold the diaphragm in place, the cover casing havinga threaded cylindrical portion adapted to be secured on the threaded end of the conventional talking machine tone arm.

4. In a device of the class described, the combination of a casing member, a cap adjustably mounted on the casing, a radio loud speaker unit mounted on the cap, a disc spaced from and in close proximity to the armaturc's of the loudspeaker unit, a threaded rod on which the disc is adjustably mounted, a cross spring attached to the easing and in which the threaded rod is mounted, and a sound reproducing diaphragm to which the end of the armature-supporting rod is attached.

ALBERT A. WALKER. 

